14 research outputs found
Obtaining Normalized Atomic Radial Distribution Functions from EELFS Spectra
The Electron Energy Loss Fine Structure method (EELFS) allows obtaining information on atomic bond lengths.
But the receiving of more complete quantitative information such as coordination numbers for some first coordination spheres
has not presently realized. The possibility of obtaining normalized radial distribution functions for EELFS which are applicable
for obtaining complete structural information for pure elements is shown in the present paper. The method was applied to the
Fe M2,3 edge
Origin of Pleistocene-Holocene ashes of the Russian northeast based on trace and rare earth element data
Allowance for the background component in X-ray photoelectron and Auger electron spectroscopy
Study of thin Ge films with amorphous and nanocrystalline phases via the techniques of EXAFS spectroscopy and AFM
Study of the local atomic structure of a silver aluminum alloy by the method of extended electron energy loss fine structure (EELFS)
The role of auto-ionization transitions in the formation of the extended fine structure of high-energy secondary electron spectra
Signatures of in-plane and out-of-plane magnetization generated by synchrotron radiation in magnetically doped and pristine topological insulators
Possibility of in-plane and out-of-plane magnetization generated by synchrotron radiation (SR) in magnetically doped and pristine topological insulators (TIs) is demonstrated and studied by angle-resolved photoemission spectroscopy. We show experimentally and by ab initio calculations how nonequal depopulation of the Dirac cone (DC) states with opposite momenta in V-doped and pristine TIs generated by linearly polarized SR leads to the hole-generated uncompensated spin accumulation followed by the SR-induced magnetization via spin-torque effect. Moreover, the photoexcitation of the DC is asymmetric, and it varies with the photon energy. We find a relation between the photoexcitation asymmetry, the generated spin accumulation, and the induced in-plane and out-of-plane magnetic field. Experimentally the SR-generated in-plane and out-of-plane magnetization is confirmed by the
k∥ shift of the DC position and by the gap opening at the Dirac point even above the Curie temperature. Theoretical predictions and estimations of the measurable physical quantities substantiate the experimental results.The authors acknowledge support by Saint Petersburg State University (Grant No. 15.61.202.2015), Russian Science Foundation Grant No. 17-12-01333 (in the part of theoretical
study of magnetic properties), Russian Science Foundation Grant No. 18-12-00062 (in the part of ARPES measurements and analysis of the electronic structure modification under influence of SR), and Russian Science Foundation Grant No. 17-12-01047 (in part of crystal growth and the sample characterization). The work was also supported by the Spanish Ministry of Economy and Competitiveness MINECO (Project No. FIS2016-76617-P), German-Russian Interdisciplinary
Science Center (G-RISC) funded by the German Federal Foreign Office via the German Academic Exchange Service (DAAD), and Russian-German laboratory atBESSYII (Helmholtz-Zentrum Berlin).Peer reviewe